Air Purge Specifications
Process Near Infrared (NIR) analyzers benefit from an air purge in dusty environments. The optical light tube is equipped with a 1/4″ brass Swagelock fitting for filtered or plant air. Air flow is typically 3-5 psig to provide a laminar air flow that prevents dirt and dust from accumulating on the lens and reducing light energy return to the detector. Higher air pressures create a turbulent flow that doesn’t protect the lens from dirt accumulation. The picture below illustrates the difference that an air purge can make in a very dusty environment such as mines, concrete processing, or other environments where dust, or dirt is prevalent.
Please contact your Process Sensors representative at 508.473-9901 to discuss your application today.